title: Geographical patterns of genetic variability in introduced Australian populations of the marine toad, Bufo marinus: sorbitol dehydrogenase, Sdh.
abstract: AThe marine toad, Bufo marinus, was introduced to Australia from Hawaii in 1935. From 1935 to 1974, the toad population expanded exponentially to occupy 584,000 km(2), and now has a continuous distribution from Cape York to Tweed River on the eastern coast of the continent. Genetic analysis of the population indicates a difference in allele frequency at the sorbitol dehydrogenase locus. There are two alleles segregating at the locus (NAD-Sdha and NAD-Sdhb). the NAD-Sdhaa homozygote is common in the two southern populations. but uncommon in northern populations. The north-south difference has been established in less than 25 generations.
mesh_terms: D000818:Animals; D002024:Bufo marinus / Q000235:genetics*; D005787:Gene Frequency; D014644:Genetic Variation; D005837:Genitalia, Male / Q000201:enzymology; D005838:Genotype; D006579:Heterozygote; D007064:L-Iditol 2-Dehydrogenase / Q000235:genetics*; D008099:Liver / Q000201:enzymology; D008297:Male; D013094:Spermatozoa / Q000201:enzymology; D013401:Sugar Alcohol Dehydrogenases / Q000235:genetics*
chemical_list: D013401:Sugar Alcohol Dehydrogenases; D007064:L-Iditol 2-Dehydrogenase